/* ==========================================================================
   Zenith — shared design system
   Dark, purple-gradient aesthetic inspired by the height-growth app category.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Rethink+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600&display=swap');

:root {
  --bg: #0b0b0b;
  --bg-elev: #131113;
  --bg-elev-2: #1a171c;
  --card: #161417;
  --card-border: rgba(255,255,255,0.08);
  --text: #ffffff;
  --text-dim: #a9a5b0;
  --text-dimmer: #726d78;
  --purple: #9844ff;
  --purple-light: #c9a6ff;
  --purple-deep: #6d1fd6;
  --green: #3ddc84;
  --red: #ff5c72;
  --amber: #ffb84d;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --max-w: 1160px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
  --font-display: 'Rethink Sans', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(680px 420px at 18% -8%, rgba(152,68,255,0.20), transparent 60%),
    radial-gradient(560px 360px at 88% 8%, rgba(152,68,255,0.12), transparent 60%);
}

h1, h2, h3, h4, .display {
  font-family: var(--font-display);
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.display, .stat-card .v, table.compare td, .pill { font-variant-numeric: tabular-nums; }

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 2px solid var(--purple-light);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ---------- Gradient text ---------- */
.grad-text {
  background: linear-gradient(180deg, #ffffff 10%, var(--purple) 85%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.grad-text-h {
  background: linear-gradient(95deg, var(--purple-light), var(--purple) 60%, var(--purple-deep));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease, opacity .15s ease;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: linear-gradient(135deg, var(--purple), var(--purple-deep));
  color: #fff;
  box-shadow: 0 6px 20px rgba(152,68,255,0.35);
}
.btn-primary:hover { box-shadow: 0 8px 26px rgba(152,68,255,0.5); transform: translateY(-1px); }
.btn-ghost {
  background: rgba(255,255,255,0.03);
  color: #fff;
  border-color: rgba(255,255,255,0.14);
}
.btn-ghost:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.25); }
.btn-block { width: 100%; }
.btn-sm { padding: 9px 16px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(11,11,11,0.75);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; font-size: 19px; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--purple), var(--purple-deep));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(152,68,255,0.45);
  font-size: 16px;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-size: 14px; color: var(--text-dim); font-weight: 500; }
.nav-links a:hover { color: #fff; }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; background: none; border: 1px solid var(--card-border); border-radius: 8px; padding: 8px 10px; color: #fff; }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
}

/* ---------- Cards ---------- */
.card {
  background: linear-gradient(180deg, var(--bg-elev), var(--card));
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
}
.card-sm { padding: 18px; border-radius: var(--radius-md); }
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 999px;
  background: rgba(152,68,255,0.12); border: 1px solid rgba(152,68,255,0.35);
  color: var(--purple-light); font-size: 12.5px; font-weight: 600;
}
.badge-soon {
  font-size: 10px; text-transform: uppercase; letter-spacing: .06em;
  background: rgba(255,184,77,0.15); color: var(--amber);
  border: 1px solid rgba(255,184,77,0.35);
  padding: 2px 7px; border-radius: 999px; margin-left: 6px; font-weight: 700;
}

/* ---------- Sections ---------- */
section { position: relative; z-index: 1; }
.section { padding: 96px 0; }
.section-tight { padding: 56px 0; }
.eyebrow {
  color: var(--purple-light); font-weight: 700; font-size: 13px;
  text-transform: uppercase; letter-spacing: .08em; margin-bottom: 14px; display: block;
}
.section-head { max-width: 640px; margin: 0 auto 56px; text-align: center; }
.section-head p { color: var(--text-dim); font-size: 17px; margin-top: 14px; }
.lede { color: var(--text-dim); font-size: 18px; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0 32px;
  color: var(--text-dim);
  font-size: 14px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 48px; }
.footer-grid h4 { color: #fff; font-size: 13px; margin-bottom: 14px; text-transform: uppercase; letter-spacing: .05em; }
.footer-grid ul li { margin-bottom: 10px; }
.footer-grid ul a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.06); flex-wrap: wrap; gap: 12px; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr 1fr; } }

/* ---------- Utility ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; } .grid-2 { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.center { text-align: center; }
.mt-8{margin-top:8px}.mt-12{margin-top:12px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}.mt-48{margin-top:48px}
.mb-8{margin-bottom:8px}.mb-12{margin-bottom:12px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}
.flex { display: flex; align-items: center; }
.flex-col { display: flex; flex-direction: column; }
.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}
.text-dim { color: var(--text-dim); }
.small { font-size: 13px; }

/* ---------- Table (comparison) ---------- */
.compare-table-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--card-border); }
table.compare {
  width: 100%; border-collapse: collapse; min-width: 640px;
  background: var(--bg-elev);
}
table.compare th, table.compare td {
  padding: 16px 20px; text-align: left; border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 14.5px;
}
table.compare th { font-family: var(--font-display); font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--text-dim); background: rgba(255,255,255,0.02); }
table.compare td.win { color: var(--green); font-weight: 700; }
table.compare tr:last-child td { border-bottom: none; }
table.compare td:first-child, table.compare th:first-child { color: var(--text-dim); font-weight: 600; white-space: nowrap; }

/* ---------- FAQ ---------- */
.faq-item { border-bottom: 1px solid var(--card-border); padding: 22px 0; }
.faq-item summary { cursor: pointer; font-weight: 700; font-size: 16px; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; color: var(--purple-light); font-size: 22px; font-weight: 400; margin-left: 12px; }
.faq-item[open] summary::after { content: '−'; }
.faq-item p { margin-top: 12px; color: var(--text-dim); font-size: 15px; line-height: 1.6; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { font-size: 13px; color: var(--text-dimmer); margin-bottom: 20px; }
.breadcrumb a:hover { color: var(--text-dim); }
.breadcrumb span { margin: 0 6px; }

/* ---------- Verdict box ---------- */
.verdict {
  border: 1px solid rgba(152,68,255,0.35);
  background: linear-gradient(135deg, rgba(152,68,255,0.12), rgba(152,68,255,0.02));
  border-radius: var(--radius-lg);
  padding: 28px;
}

/* ---------- Responsive type ---------- */
h1.hero-h1 { font-size: 56px; line-height: 1.05; }
@media (max-width: 720px) { h1.hero-h1 { font-size: 36px; } }
h2.h2 { font-size: 34px; }
@media (max-width: 720px) { h2.h2 { font-size: 26px; } }

/* ---------- Skip link ---------- */
.skip-link { position: absolute; left: -999px; top: 0; background: var(--purple); color: #fff; padding: 10px 16px; border-radius: 8px; z-index: 100; }
.skip-link:focus { left: 16px; top: 16px; }